Waterproof cement and method of making.



by mixing in t l iTIONS,

a! 6 0R PLASTIC UNITED STATES PATE T oFFIoE'.

noBEn 'scnULEn, on NEW xonx, N. Y., assronon, IBY MESNE "GIBRALTAR STONECOMPANY,

ASSIGNMENTS, To THE a conroraarron on cam.

WATERPROOF cnmENT .eNnmETrron or name.

To all whom it may concern:

Be it,known that I, ROBERT SoHuLER, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented new and useful Improvements in Waterproof Cement andMethods of Making, of which the following is a specification. The objectof the present invention, is the production of a water-proof cement ofexcellent bindin power, which may be' used c usual way with concreteaggregates, such as sand, gravel, stone and water.

It has been proposed by several inventors to add materials to Portlandcement for the purpose of water-proofing the same, and otherwise,improving the character of the cement as well as the concrete or otherarticles made therefrom. Lime soaps have been used which give reasonablygood' results so far as the water-proofing is concerned but with asomewhat smaller strength of the finished article. Also ordinary soapshave been used, in order to produce a somewhat similar result. p

In carrying out my invention in its pre-' ferred form, I add to 100 lbs.cement the followin ingredients: 1% s. o

soa (dr 14 s. o s o h drated lime a ese materlals siou e a e to t ecement separately and thoroughly mixed therewith, after which, theentire mass of cement should be thoroughly mixed together and is thenready for shipment or use. In carrying out the-invention in thepreferred form, I mix the alum with a small amount 5 or 10- lbs.) ofcement and mix the soap with an} other 5 or 10 lbs. of cement, and mixthe pozzuolana cement with 15 to 20 lbs. of the ortland cement, and mixthe lime with 15 to 20 lbs. of the Portland cement. After this, enoughmore cement is added to brin the total up to about 100 lbs, after whicli the entire batch of cement is carefully and thoroughly mixed. In thismanner the mix- I Specification of Letters Patent. Application filedMarch 18, 1913. Serial No. 755,244.

of Portland Patented Dec. 9, 1913.

- WK 9 ture of the materials with the cement is made very thorough andthe alum, soap, pozzuolana cement and hydrated lime do not react witheach other, but remain as such, mixed with the cement until the water isadded to the cement. If desired separate portions of the cement clinkermay be mixed with the separate ingredients andgrpund order to I havegiven a specific example, the exact proportions of certain statingmaterials, it is to be noted that the invention is not restricted tothese particular proportions, since more or less variation ispermissible.

What I claim is 1. A water-proof cement comprising Porta soluble soap,pozzuoland cement, alum,

mixed tolana cement and hydrated lime, gether.

2. A water-proof cement mixture comprising 200 parts, Portland cement, 3parts alum, -3 parts potash soap, 28 parts pozzuo- 'lana cement, and 24parts hydrated lime,

thoroughly intermixed.

3. The process of producing a water-proof Portland cement, whichcomprises mixing Examiner produce a thorough separate portions of thecement with suit able amounts of alum, solublesoap, ozzuolana cement andhydrated lime, an thereafter mixing these portions together.

4. The process of producing a water-proof Portland cement, whichcomprises thoroughly mixing separate portionsof. the cement with 3 partsalum, 3 parts potash soap, 28 parts pozzuolana cement and 24 partshydrated lime, and thereafter mixing the separate portlons thorou hlywith each other, the total amount of Portland cement being 200 parts.

In testimon whereof I afiix my signature in presence 0 two witnesses.

ROBERT SCHULER.

Witnesses:

Jos. F. STEEPKA,

IVAN T. QUICK.

